TWI635386B - Heat sink device - Google Patents

Abstract

This case provides a heat dissipation device, which includes a first heat dissipation fin set, a second heat dissipation fin set, a heat pipe, and a base for thermal contact with a heat source. The heat pipe includes a first heat pipe portion and an upwardly extending portion connected to the first heat pipe portion A second heat pipe portion, and the first heat pipe portion is disposed between the base and the second heat dissipation fin group, and the second heat pipe portion passes through the first heat dissipation fin group, wherein the top surface of the first heat dissipation fin group and the base Is greater than the distance between the top surface of the second heat dissipation fin group and the base.

Description

Radiator

This case is about a heat sink, especially a heat sink with heat sink fins.

With the rapid development of computers and various electronic devices and the convenience they bring, modern people have become accustomed to using time. However, when computers and various electronic devices are operated for a long time, their The disadvantage that the heat cannot be dissipated in time is also accompanied.

In view of this, a heat dissipation device with heat dissipation fins is proposed to improve the problem. Please refer to FIG. 1, which is a schematic diagram of the appearance of a conventional heat sink. The heat dissipation device 1 includes a plurality of heat pipes 10, heat dissipation fin groups 11 and a base 12, the base 12 is in thermal contact with a heat source (not shown), and the heat dissipation fin groups 11 are arranged along the vertical direction D1 and are close to neighbor A plurality of parallel heat dissipation fins 111, and each heat pipe 10 includes a first heat pipe portion 101, a third portion connected to one side of the first heat pipe portion 101 and extending upward The second heat pipe portion 102 and the third heat pipe portion 103 connected to the other side of the first heat pipe portion 101 and extending upwardly bent; wherein, the first heat pipe portion 101 of each heat pipe 10 is disposed on or passes through the base 12 The second heat pipe portion 102 and the third heat pipe portion 103 of each heat pipe 10 respectively pass through both sides of each heat dissipation fin 111 of the heat dissipation fin group 11 from bottom to top.

Next, the operation of the heat sink 1 will be described. Please refer to FIG. 2, which is a conceptual side view of the heat dissipation device and fan used in FIG. 1. The heat energy generated by the heat source is first conducted to the base 12 and then to the first heat pipe portion 101 of each heat pipe 10 through the base 12. The first heat pipe portion 101 of each heat pipe 10 can transfer the received heat energy to two The second heat pipe portion 102 and the third heat pipe portion 103 on the side are conducted so that the heat energy is finally conducted to the heat dissipation fin group 11 and its vicinity. In addition, the fan 2 is adjacent to one side of the heat dissipation device 1, and the role of the fan 2 is to drive the airflow P1 through the heat dissipation fin group 11 to take away the heat energy collected in the heat dissipation fin group 11 and its vicinity. The working principle of the heat pipe 10 is known to those skilled in the art, so it will not be repeated here.

In particular, in order to increase the efficiency of heat dissipation, the design of the general heat dissipation device 1 will use space as much as possible to install heat dissipation fins 111 to increase the heat dissipation area, so the appearance of the heat dissipation device 1 will be shown in FIGS. Tower-like structure, commonly known as tower-shaped heat sink. However, when the heat dissipation device 1 is applied to a large electronic device or system, such as a cloud servo system, the location of the fan 2 is not necessarily close to the heat dissipation device 1, so the airflow P1 driven by the fan 2 may reach the heat dissipation from a distance The device 1, but the tower-like structure instead forms wind resistance and affects the flow of air P1 through the heat dissipation fin group 11, resulting in poor heat dissipation.

According to the above description, in the design of the heat dissipation device, how to balance the heat dissipation area and the wind resistance has become an urgent research topic.

The main purpose of the present invention is to provide a heat dissipation device that has both heat dissipation area and wind resistance considerations.

In a preferred embodiment, the present invention provides a heat dissipation device including: a first heat dissipation fin set; a base for thermal contact with a heat source; and a heat pipe including a first heat pipe portion and connected to the first A second heat pipe portion that is bent and extends upward on one side of a heat pipe portion, and the first heat pipe portion is disposed on the base, and the second heat pipe portion passes through the first heat dissipation fin set; and a second heat dissipation The fin group is disposed above the first heat pipe portion; wherein, a maximum vertical distance between a top surface of the first heat dissipation fin group and the base is greater than a top surface of the second heat dissipation fin group A maximum vertical distance between the bases.

In a preferred embodiment, a maximum vertical distance between a bottom surface of the first heat sink fin group and the base is greater than a maximum vertical distance between a bottom surface of the second heat sink fin group and the base.

In a preferred embodiment, the first heat dissipation fin set includes A plurality of first heat dissipation fins arranged in a first arrangement direction, and the second heat dissipation fin group includes a plurality of second heat dissipation fins arranged along a second arrangement direction; wherein the first arrangement direction is different from the second Arrange the direction.

In a preferred embodiment, the first heat dissipation fin group and the second heat dissipation fin group respectively include a first fin material and a second fin material, and the first fin material and the second fin material The fin material has a first thermal conductivity and a second thermal conductivity respectively; wherein the first thermal conductivity is smaller than the second thermal conductivity.

In a preferred embodiment, the second heat dissipation fin group includes a plurality of second heat dissipation fins arranged along a second arrangement direction, and the heat dissipation device further includes a cover for covering the second heat dissipation fin Sheet set; wherein, the mask includes corresponding two closed side walls, and the two closed side walls are arranged along the second arrangement direction.

In a preferred embodiment, the heat dissipation device further includes a third heat dissipation fin set, and the heat pipe further includes a third heat pipe portion connected to the other side of the first heat pipe portion and bent upward to extend; wherein The third heat pipe portion passes through the third heat dissipation fin group, and the second heat dissipation fin group is located between the first heat dissipation fin group and the third heat dissipation fin group.

In a preferred embodiment, a maximum vertical distance between a top surface of the third heat sink fin group and the base is greater than a maximum vertical distance between the top surface of the second heat sink fin group and the base distance.

In a preferred embodiment, a maximum vertical distance between a bottom surface of the third heat sink fin group and the base is greater than a maximum vertical distance between a bottom surface of the second heat sink fin group and the base.

In a preferred embodiment, the third heat dissipation fin group includes a plurality of third heat dissipation fins arranged along a third arrangement direction, and the second heat dissipation fin group includes a plurality arranged along a second arrangement direction A plurality of second heat dissipation fins; wherein the third arrangement direction is different from the second arrangement direction.

In a preferred embodiment, the third heat dissipation fin group and the second heat dissipation fin group respectively include a third fin material and a second fin material, and the third fin material and the second fin material The fin material has a third thermal conductivity and a second thermal conductivity respectively; wherein the third thermal conductivity is smaller than the second thermal conductivity.

1‧‧‧radiating device

2‧‧‧Fan

3‧‧‧radiating device

4‧‧‧Electronic device or system

4’‧‧‧Electronic device or system

10‧‧‧heat pipe

11‧‧‧Cooling Fin Set

12‧‧‧Base

30‧‧‧heat pipe

31‧‧‧The first cooling fin set

32‧‧‧Second cooling fin set

33‧‧‧The third cooling fin set

34‧‧‧Base

35‧‧‧heat pipe

36‧‧‧Fourth cooling fin set

37‧‧‧Fifth fin set

38‧‧‧The sixth cooling fin set

39‧‧‧Base

41‧‧‧heat source

42‧‧‧heat source

101‧‧‧The first heat pipe department

102‧‧‧Second Heat Pipe Department

103‧‧‧The third heat pipe department

111‧‧‧ Fin

310‧‧‧Top surface of the first cooling fin set

311‧‧‧The first cooling fin

319‧‧‧Bottom surface of the first cooling fin set

320‧‧‧Top surface of the second cooling fin set

321‧‧‧Second cooling fin

322‧‧‧Mask

329‧‧‧Bottom surface of the second fin set

330‧‧‧Top surface of the third cooling fin set

331‧‧‧The third cooling fin

339‧‧‧Bottom surface of the third cooling fin set

360‧‧‧Top surface of the fourth cooling fin set

380‧‧‧The top surface of the sixth cooling fin set

3221‧‧‧Sidewall

3222‧‧‧Sidewall

D1‧‧‧ direction

D21‧‧‧ direction

D22‧‧‧ direction

D23‧‧‧ direction

P1‧‧‧Airflow

P2‧‧‧Airflow

P21‧‧‧Airflow

P22‧‧‧Airflow

P23‧‧‧Airflow

Figure 1: Schematic diagram of the external structure of a conventional heat sink.

Figure 2: It is a conceptual side view of the heat dissipation device shown in Figure 1 used with a fan.

FIG. 3 is a schematic diagram showing the appearance of the heat dissipation device of the present invention in a first preferred embodiment.

Fig. 4 is a conceptual side view of the heat dissipation device shown in Fig. 3.

FIG. 5 is a schematic diagram showing the structure of the second heat dissipation fin set and shield of the heat dissipation device of the present invention in a second preferred embodiment.

FIG. 6 is a side view of the structural concept of the heat dissipation device of the present invention in a third preferred embodiment.

Figure 7: It is the structure of the heat dissipation device of the present invention in a fourth preferred embodiment Side view of construction concept.

FIG. 8 is a side view of the structural concept of the heat dissipation device of the present invention in a fifth preferred embodiment.

Please refer to FIGS. 3 and 4. FIG. 3 is a schematic diagram of the appearance of the heat dissipation device of the present invention in a first preferred embodiment. FIG. 4 is a conceptual side view of the heat dissipation device shown in FIG. 3. Some components of the heat dissipation device shown in FIG. 3 are drawn. The heat dissipation device 3 includes a plurality of heat pipes 30, a first heat dissipation fin group 31, a second heat dissipation fin group 32, a third heat dissipation fin group 33, and a base 34. The base 34 is used for thermal contact with the heat source 41. The heat source 41 may be any A heating element of an electronic device or system 4, such as a heating element of a cloud servo system, and each heat pipe 30 includes a first heat pipe portion 301, and a second heat pipe portion connected to one side of the first heat pipe portion 301 and extending upwardly bent 302 and a third heat pipe portion 303 connected to the other side of the first heat pipe portion 301 and extending upwardly bent; wherein, the first heat pipe portion 301 of each heat pipe 30 is in thermal contact with the base 34, such as a recess provided in the base 34 At the groove (not shown), and disposed below the second heat dissipation fin group 32 and in thermal contact with the second heat dissipation fin group 32, and the second heat pipe portion 302 and the third heat pipe portion 303 of each heat pipe 30 The first heat dissipation fin group 31 and the third heat dissipation fin group 33 respectively pass from bottom to top.

The thermal contact referred to herein refers to contact with heat conduction, which includes at least two embodiments of direct contact and indirect contact. Of course, it is not excluded that the two are very close but are not really in structure. Implementation. on For direct contact, it may be, for example, direct bonding of two components, such as the direct bonding of the first heat pipe portion 301 of the heat pipe 30 and the base 34, and the second heat dissipation fin set 32 and the first heat pipe portion 301 of each heat pipe 30 Direct bonding, or direct bonding of the base 34 and the heat source 41; for indirect contact, for example, two elements may be provided with a thermal conductive medium, such as a thermal paste (not shown), but not limited to the above.

Furthermore, the first heat dissipation fin group 31 includes a plurality of first heat dissipation fins 311 arranged along the first arrangement direction D21 and each is nearly parallel to the neighbors, and the second heat dissipation fin group 32 includes a second arrangement direction A plurality of second heat dissipation fins 321 arranged in D22 and being nearly parallel to the neighbors, respectively, and a third heat dissipation fin group 33 including a plurality of third heat dissipation fins arranged in the third arrangement direction D23 and being respectively parallel to the neighbors Sheet 331; wherein, the first arrangement direction D21 is the same as the third arrangement direction D23, and the first arrangement direction D21 and the third arrangement direction D23 are different from the second arrangement direction D22. In the preferred embodiment, the first arrangement direction D21 and the third arrangement direction D23 are both perpendicular to the base 34, and the second arrangement direction D22 is a direction parallel to the base 34.

In particular, in the structure of the heat dissipation device 3 in this case, the top surface 310 of the first heat dissipation fin group 31 (as shown in the top surface of the first heat dissipation fin 311 in FIG. 3 and FIG. 4) and the base 34 The maximum vertical distance between them is greater than the maximum perpendicularity between the top surface 320 of the second heat dissipation fin group 32 (such as the plane formed by one side edge of the plurality of second heat dissipation fins 321 in FIGS. 3 and 4) and the base 34 Similarly, the maximum vertical distance between the top surface 330 of the third heat dissipation fin group 33 (as shown in the top surface of the third heat dissipation fin 331 in FIG. 3 and FIG. 4) and the base 34 is greater than that of the second heat dissipation The maximum vertical distance between the top surface 320 of the fin set 32 and the base 34.

Preferably, but not limited to this, the maximum vertical distance between the bottom surface 319 of the first heat dissipation fin group 31 (as shown in the bottom surface of the first heat dissipation fin 311 in FIG. 3 and FIG. 4) and the base 34 The maximum vertical distance between the bottom surface 329 of the second heat dissipation fin group 32 (as shown by the plane formed by the other side edges of the plurality of second heat dissipation fins 321 in FIGS. 3 and 4) and the base 34 is the same. The maximum vertical distance between the bottom surface 339 of the third heat dissipation fin group 33 (as shown in the bottom surface of the third heat dissipation fin 331 in FIG. 3 and FIG. 4) and the base 34 is greater than the bottom surface of the second heat dissipation fin group 32 The maximum vertical distance between the bases 34.

Next, the operation of the heat sink 3 will be described. The heat energy generated by the heat source 41 is first transferred to the base 34 in thermal contact with the heat source 41, and then transferred to the first heat pipe portion 301 of each heat pipe 30 through the base 34, and the first heat pipe portion 301 of each heat pipe 30 is A part of the received heat energy will be conducted upward to the second heat dissipation fin group 32 in thermal contact with it, and the first heat pipe portion 301 of each heat pipe 30 may also transfer the other part of the received heat energy to the two sides The second heat pipe portion 302 and the third heat pipe portion 303 are conducted so that the other part of the heat energy is finally transmitted to the first heat dissipation fin group 31 and the third heat dissipation fin group 33. The working principle of the heat pipe 30 is known to those skilled in the art, so it will not be repeated here.

As the airflow P2 passes through the heat dissipation device 3 along the direction of the first heat dissipation fin group 31 toward the third heat dissipation fin group 33, the upper air flow P21 sequentially passes through the first heat dissipation fin group 31 and the third heat dissipation fin Group 33 to take away the heat energy gathered in the first heat dissipation fin group 31, the third heat dissipation fin group 33 and the vicinity thereof, wherein the airflow P21 passing through the first heat dissipation fin group 31 is not affected by the second heat dissipation fin group 32 blocking It reaches the third heat dissipation fin group 33 with less wind resistance; the lower airflow P22 can reach the second heat dissipation fin group 32 with less wind resistance because it is not blocked by the first heat dissipation fin group 31, And take away the heat energy gathered in the second heat dissipation fin group 32 and its vicinity, and the airflow P22 passing through the second heat dissipation fin group 32 is also less wind resistance because it is not blocked by the third heat dissipation fin group 33 In this case, it is quickly discharged outside the heat sink 3.

Preferably, but not limited to this, the first heat dissipation fin group 31, the second heat dissipation fin group 32, and the third heat dissipation fin group 33 are made of the first fin material, the second fin material, and the third Made of fin material, and the thermal conductivity of the second fin material is greater than the thermal conductivity of the first fin material and the thermal conductivity of the third fin material, for example, the second fin material is copper material, and the first fin material Both the sheet material and the third fin material are made of aluminum. In this way, the second heat dissipation fin group 32 closest to the heat source 41 has better heat conduction performance, thereby improving the overall heat dissipation effect of the heat dissipation device 3.

Of course, the above is only a preferred embodiment, and those skilled in the art can make any equal change design according to the actual application requirements. The following provides several preferred embodiments of the heat dissipation device 3 in this case.

Please refer to FIG. 5, which is a schematic diagram of the structural concept of the second heat dissipation fin set and shield of the heat dissipation device of the present invention in a second preferred embodiment. In order to illustrate the present preferred embodiment more clearly, only the second heat dissipation fin group and the cover are depicted in FIG. 5. Among them, the heat dissipation device of this preferred embodiment is substantially similar to that described in the first preferred embodiment of this case, and will not be described here again, but this preferred embodiment is different from the aforementioned first preferred embodiment. The heat dissipation device further includes a cover 322, which is used to cover the second heat dissipation fin group 32, and the cover 322 includes corresponding two seals arranged along the second arrangement direction The closed side walls 3221, 3222, so that the airflow P (not shown in FIG. 5, please refer to FIG. 4) reaching the second heat dissipation fin group 32 can be more concentrated toward the third heat dissipation fin group 33 (not shown in FIG. 5) , Please refer to FIG. 3 and FIG. 4) through the second heat dissipation fin group 32.

Please refer to FIG. 6, which is a structural side view of the heat dissipation device of the present invention in a third preferred embodiment. Among them, the heat dissipation device of this preferred embodiment is substantially similar to that described in the first preferred embodiment of this case, and will not be described here again, but this preferred embodiment is different from the aforementioned first preferred embodiment. The reason is that the heat dissipation device is not provided with the third heat dissipation fin group 33 due to the consideration of available space or other practical requirements, and the heat pipe 30 does not have the third heat pipe portion 303.

Please refer to FIG. 7, which is a side view of the structural concept of the heat dissipation device of the present invention in a fourth preferred embodiment. Among them, the heat dissipation device of this preferred embodiment is substantially similar to that described in the first preferred embodiment of this case, and will not be described here again, but this preferred embodiment is different from the aforementioned first preferred embodiment. The heat dissipation device is applied to an electronic device or system 4 'having more than two heat sources 41, 42 and the heat dissipation device further includes a plurality of heat pipes 35, a fourth heat dissipation fin group 36, and a fifth heat dissipation fin group 37 、 The sixth heat dissipation fin group 38 and another base 39.

Wherein, the base 34 and the other base 39 are in thermal contact with two different heat sources 41 and 42 respectively, and the other plurality of heat pipes 35, the fourth heat dissipation fin group 36, the fifth heat dissipation fin group 37, and the sixth heat dissipation The structural connection relationship and relative positional relationship between the fin group 38 and the other base 39 are the same as the plural heat pipes 30, the first heat dissipation fin group 31, the second heat dissipation fin group 32, and the third heat dissipation fin group 33 And the structural connection relationship and relative position relationship between the bases 34, therefore, the heat source 42 produces The heat energy can be conducted to the fourth heat dissipation fin group 36, the fifth heat dissipation fin group 37, and the sixth heat dissipation fin group 38, respectively.

In particular, in this preferred embodiment, the top surface 360 of the fourth heat dissipation fin group 36 and the top surface 380 of the sixth heat dissipation fin group 38 are higher than the top surface 310 of the first heat dissipation fin group 31 And the top surface 330 of the third heat dissipation fin group 33, so that when the airflow P23 passes through the heat dissipation device 3 along the direction of the first heat dissipation fin group 31 toward the sixth heat dissipation fin group 38, Reaching the fourth heat dissipation fin group 36 and the sixth heat dissipation fin group 38 with little wind resistance, and taken away and gathered in the fourth heat dissipation fin group after passing through the fourth heat dissipation fin group 36 and the sixth heat dissipation fin group 38 Group 36, the sixth heat dissipation fin group 38 and the thermal energy in the vicinity thereof.

Please refer to FIG. 8, which is a structural side view of the heat dissipation device of the present invention in a fifth preferred embodiment. Among them, the heat dissipation device of this preferred embodiment is roughly similar to that described in the fourth preferred embodiment of the present case, and will not be repeated here, but this preferred embodiment is different from the aforementioned fourth preferred embodiment The reason is that the heat dissipation device is not provided with the third heat dissipation fin group 33 and the sixth heat dissipation fin group 38 due to the consideration of available space or other practical requirements, so the heat pipes 30, 35 do not need to extend upward to A portion passing through the third heat dissipation fin group 33 or the sixth heat dissipation fin group 38.

According to the above description, no matter whether the electronic device or system applying the heat dissipation device of this case is provided with a fan, and regardless of the distance of the fan from the heat dissipation device, the heat dissipation device of this case can take into account the influence of the heat dissipation area and wind resistance, so that the heat dissipation effect is effectively improved With industrial use value.

The above-mentioned embodiments are only illustrative to illustrate the principle and functions of the present invention. And to explain the technical features of the present invention, not to limit the scope of protection of the present invention. Anyone who is familiar with this technology can easily complete the changes or equal arrangements without violating the technical principles and spirit of the present invention, which are within the scope of the present invention. Therefore, the scope of protection of the rights of the present invention should be as listed in the scope of patent application mentioned later.

Claims (9)

A heat dissipation device includes: a first heat dissipation fin set; a base for thermal contact with a heat source; and a heat pipe including a first heat pipe portion and a side connected to the first heat pipe portion and extending upwardly A second heat pipe portion, and the first heat pipe portion is disposed on the base, and the second heat pipe portion passes through the first heat dissipation fin group; and a second heat dissipation fin group is provided on the first heat pipe portion Above; wherein, the heat dissipation device is a passive heat dissipation device that does not include a fan, and supplies an air flow through the first heat dissipation fin group toward the second heat dissipation fin group, and the first heat dissipation fin A maximum vertical distance between a top surface of one of the groups and the base is greater than a maximum vertical distance between a top surface of the second heat dissipation fin group and the base, so that the airflow above one of the airflows passes through the first A heat-dissipating fin group takes away the heat energy gathered in the first heat-dissipating fin group and its vicinity and is not blocked by the second heat-dissipating fin group, and a bottom surface of the first heat-dissipating fin group and the base A maximum vertical distance between is greater than the second divergence A maximum vertical distance between the bottom surface of one of the fin groups and the base, so that one of the airflows below the airflow is not blocked by the first heat dissipation fin group to reach the second heat dissipation fin group and take away the gathered Thermal energy of the second heat dissipation fin group and its vicinity. The heat dissipation device as described in item 1 of the patent application range, wherein the first heat dissipation fin group includes a plurality of first heat dissipation fins arranged along a first arrangement direction, and the second heat dissipation fin group includes A plurality of second heat dissipation fins arranged in the second arrangement direction; wherein the first arrangement direction is different from the second arrangement direction. The heat dissipation device as described in item 1 of the patent application range, wherein the first heat dissipation fin group and the second heat dissipation fin group respectively include a first fin material and a second fin material, and the first fin The sheet material and the second fin material respectively have a first thermal conductivity and a second thermal conductivity; wherein the first thermal conductivity is smaller than the second thermal conductivity. The heat dissipation device as described in item 1 of the patent application, wherein the second heat dissipation fin group includes a plurality of second heat dissipation fins arranged along a second arrangement direction, and the heat dissipation device further includes a cover for Covering the second heat dissipation fin set; wherein the cover includes two corresponding closed side walls, and the two closed side walls are arranged along the second arrangement direction. The heat dissipation device as described in item 1 of the patent application scope further includes a third heat dissipation fin set, and the heat pipe further includes a third heat pipe connected to the other side of the first heat pipe portion and bent upwardly and extending Wherein, the third heat pipe portion passes through the third heat dissipation fin group, and the second heat dissipation fin group is located between the first heat dissipation fin group and the third heat dissipation fin group. The heat dissipation device as described in item 5 of the patent application range, wherein a maximum vertical distance between a top surface of the third heat dissipation fin group and the base is greater than that of the top surface and the base of the second heat dissipation fin group The maximum vertical distance between. The heat dissipation device as described in item 5 of the patent application, wherein a maximum vertical distance between a bottom surface of the third heat dissipation fin group and the base is greater than a bottom surface of the second heat dissipation fin group and the base A maximum vertical distance. The heat dissipation device as described in item 5 of the patent application, wherein the third heat dissipation fin group includes a plurality of third heat dissipation fins arranged along a third arrangement direction, and the second heat dissipation fin group includes A plurality of second heat dissipation fins arranged in the second arrangement direction; wherein the third arrangement direction is different from the second arrangement direction. The heat dissipation device as described in item 5 of the patent application, wherein the third heat dissipation fin group and the second heat dissipation fin group respectively include a third fin material and a second fin material, and the third fin The sheet material and the second fin material respectively have a third thermal conductivity and a second thermal conductivity; wherein the third thermal conductivity is smaller than the second thermal conductivity.